JP6274263B2 - Relay device - Google Patents

Description

  The present invention relates to a relay device that relays communication from another radio or telephone to a radio via a network.

  A relay device that relays communication through a network such as a LAN has been proposed so that transceivers in areas where radio waves do not reach each other can communicate with each other (see, for example, Patent Document 1). In the system of Patent Document 1, communication between the transceiver and the telephone is also possible by relaying a relay device.

JP 2011-135290 A

  However, in the system of Patent Document 1, since a plurality of transceivers communicate with one relay device and a transceiver cannot be specified, all the transceivers connected to this relay device are communicated via this relay device. Will be heard.

  Therefore, it is conceivable that the transceiver is individually called from the relay device for communication so that other transceivers cannot intercept the communication contents. In the case of a telephone, dialing a plurality of times such as an outside line number + an extension number is normally performed, and it is desirable that an arbitrary communication partner (transceiver) can be designated by a plurality of times of dialing. On the other hand, in the case of a wireless device such as a portable transceiver, since it is operated with one hand and the number of buttons is small, it is desired that a desired counterpart device can be quickly and easily called by a simple operation.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a relay device that can make individual calls corresponding to both incoming calls from a telephone and incoming calls from a transceiver.

The relay device according to the present invention is connected to a radio interface to which a relay radio that communicates with a plurality of terminal radios is connected, and a network that is a data communication network, and communicates from other devices connected to the network. A network interface that receives the request and radio designation information designating one of the terminal radios in the form of an SIP protocol INVITE message, and a radio interface and a control unit connected to the network interface. The control unit includes a table that associates the radio designation information with the call code that the relay radio transmits together with the voice signal, and when receiving the INVITE message from another device, the control unit includes the radio included in the INVITE message. The device designation information is read, the table is searched with the read radio device designation information, the corresponding call code is read, and the read call code is transmitted to the relay radio device via the radio interface. The relay radio is instructed to transmit an audio signal including a code.

  According to the present invention, the terminal radio is designated by the radio designation information included in the INVITE message, and the individual call is made to the terminal radio. Thereby, communication can be established in a simple procedure.

It is a block diagram of the communication system with which the relay apparatus which is embodiment of this invention is applied. It is a figure which shows the memory content of the transceiver which is a terminal radio | wireless machine. It is a block diagram of a relay apparatus. It is a figure which shows the memory content of the memory | storage part of a relay apparatus. It is a flowchart which shows operation | movement of a relay apparatus.

  A communication system in which the relay device of the present invention is used will be described with reference to the drawings. FIG. 1 is a configuration diagram of a communication system. This communication system is a system that uses the relay device 2 to enable communication between the transceivers 4 that are terminal radios and communication between the transceiver 4 and the IP telephone 6 or the telephone 8.

  As the network 1, for example, a LAN configured by Ethernet (registered trademark) or the Internet can be applied. A plurality of relay apparatuses 2 (two in FIG. 1) are connected to the network 1. Each relay device 2 (2A, 2B) covers different communication areas A, B, respectively. A repeater 3 (3A, 3B), which is a relay radio device, is connected to the relay device 2. The repeater 3 is a stationary transceiver, and is a full-duplex communication device that can perform transmission and reception at the same time, even if it is a so-called push-to-talk (PTT) type half-duplex communication device. May be. Within the communication range of the repeater 3, one or a plurality (two in the figure) of transceivers 4 (4A-1, 2, 4B-1, 2) exist.

  The repeater 3 and the transceiver 4 are digital transceivers that can communicate with each other. The digital transceiver transmits and receives wirelessly audio signals and data converted into digital signals. In addition, control information such as destination information can be transmitted and received in parallel with transmission and reception of audio signals. The repeater 3 packetizes the digital signal received from the transceiver 4 and inputs the packet to the relay device 2, extracts the voice signal and control information from the packet input from the relay device 2, and extracts the voice signal and control information on the time axis. Convert to digital signal and send. The repeater 3 corresponds to the relay radio of the present invention, and the transceiver 4 corresponds to the terminal radio of the present invention.

  In addition, an IP telephone 6 and a VoIP gateway 7 are connected to the network 1. A telephone 8 is connected to the VoIP gateway 7. The VoIP gateway is a gateway device that relays a VoIP (Voice over Internet Protocol) procedure for transmitting a voice signal via the network 1 and the telephone 8 that is a voice call device.

  In the following embodiment, when the IP telephone 6, the telephone 8, or the transceiver 4B-1 or 2 sends a communication request to the relay apparatus 2A in order to communicate with the transceiver 4A-1 or 4A-2. Will be described.

  The relay device 2 incorporates a simple SIP server function and operates as follows. When the communication destination information is included in the signal received from the transceiver 4 via the repeater 3, an INVITE message in which the communication destination is written in the TO header is transmitted to the partner apparatus. When an INVITE message is received from another device, if the wireless device identification information specifying the transceiver 4 is included in the INVITE message, the repeater 3 is called by the repeater 3 specified by the INVITE message. If the received INVITE message does not include the wireless device identification information for designating the transceiver 4, the wireless device sent to the other device is requested in response to the wireless device identification information (second dial). The repeater 3 is called by the transceiver 4 specified by the identification information.

  As shown in FIG. 2, the transceiver 4 stores an ID (radio device identification information) for identifying the own station and a group number to which the own station belongs, and the received digital signal includes destination information as destination information. If the ID or the group number to which the own station belongs is embedded, this signal is demodulated and an audio signal is output from a speaker or the like. If the received digital signal is not embedded with the ID of the own station or the group number to which the own station belongs, the digital signal is discarded. The ID of the own station and the group number to which the own station belongs are inserted, for example, as a squelch code in the received audio signal.

  FIG. 3 is a block diagram of the relay device 2. FIG. 4 is a diagram showing the contents stored in the storage unit 24. The relay apparatus 2 includes a control unit 20, and includes a radio interface 21 at the downstream (repeater 3 side) end and a network interface 22 at the upstream (network 1 side) end. For example, an Ethernet (registered trademark) physical layer connector can be applied to both the radio interface 21 and the network interface 22 and is in charge of the physical layer and data link layer of digital communication.

  The radio interface 21 inputs the packet input from the repeater 3 to the control unit 20 and transfers the packet input from the control unit 20 to the repeater 3. The network interface 22 inputs a packet from another device received via the network 1 to the control unit 20 and sends a packet input from the control unit 20 to the network 1.

  The control unit 20 includes a microcomputer and functionally includes a SIP processing unit 23, a storage unit 24, an upstream packet processing unit 25, and a downstream packet processing unit 26. In the storage unit 24, a local station IP address storage area 200, a local station telephone number storage area 201, a connection information table 202, and a radio number table 203 shown in FIG. 4 are set.

  The SIP processing unit 23 executes the following processing so that the transceiver 4 can communicate with other devices on the network 1. When a call request is received from the transceiver 4 via the repeater 3, the INVITE message is edited and transmitted to the partner apparatus based on the communication partner designation information included in the call request.

  The connection information table 202 set in the storage unit 24 stores connection information for connecting to the transceiver 4 identified by the communication partner designation information (connected to another relay device 2). That is, the connection information table 202 identifies the call type (type of whether the call is a group call or individual call) and the communication partner transceiver 4 as connection information for connection to the communication partner transceiver 4. The ID is stored, and further, the IP address of the relay device 2 to which the transceiver 4 is connected is stored.

  When the SIP processing unit 23 receives a call request from the transceiver 4 via the repeater 3, the SIP processing unit 23 edits the INVITE message using connection information corresponding to communication partner designation information included in the call request. That is, a URI is created by combining an ID and an IP address, and set as a destination (content of TO header). For example, in the connection information table 202 of FIG. 4, if the communication partner identification information is * 1, the URI is *0002@192.168.8.0. zz. In this way, the transceiver 4 can edit and transmit the INVITE message that directly designates the communication partner only by transmitting simple communication partner identification information (for example, * 1).

  When receiving the INVITE message from the network 1, the SIP processing unit 23 determines which transceiver 4 of the transceivers 4 under its control is called based on the information in the TO header of the INVITE message. . That is, when the user part (part before @) of the URI written in the TO header is read and this is not “0000”, that is, the relay device 2 itself is not designated, this user part is used as an ID. The wireless device number table 203 is searched to find the corresponding transceiver 4 (wireless device number). The wireless device number is transferred to the repeater 3, and the repeater 3 is instructed to make an individual call to the determined transceiver 4. If the URI user part is “0000” designating the relay device 2, a signal requesting a second dial (ID transmission) is returned to the source device, and the ID is sent from this device. Receive. Then, using the received user information as an ID, the wireless device number table 203 is searched to find the corresponding transceiver 4. The repeater 3 is instructed to make an individual call to the determined transceiver 4. Thereafter, the SIP procedure is advanced to establish a communication (call) session.

  The uplink packet processing unit 25 performs a process of reading a voice signal from an uplink voice packet input from the repeater 3 through the radio interface 21 during a call session, converting the voice signal into an RTP packet, and transferring the RTP packet to the network interface 22. The downstream packet processing unit 26 has a VOX (Voice Operated Relay) function, and monitors the level and duration of an audio signal included in an RTP packet input from the network interface 22 during a call session. When the level and duration of the input audio signal exceeds a predetermined threshold value, it is assumed that the speech voice is input from the counterpart device, and this RTP packet is a voice packet in which call information is embedded in the voice signal. To the repeater 3. When a voice packet is input from the relay device 2, the repeater 3 turns on the PTT and transmits a voice signal included in the voice packet.

  Digital signals such as a radio number and communication partner designation information transmitted / received between the repeater 3 and the transceiver 4 are written in a control information area between the audio signals. Also, the radio number may be written as a squelch code. The digital signal in which the radio number is written is demodulated and reproduced only by the transceiver 4 identified by the radio number. Using this function, the individual call by the selective call is realized.

  In the above description, the example in which the communication partner is directly specified by transmitting the INVITE message in which the communication partner ID is written in the URI user part has been described. However, the URI user part specifies the relay device 2 " It may be fixed to “0000”, and the communication partner ID may be directly specified by writing the ID of the communication partner in the display name column of the TO header.

  The operation of the relay device 2 when receiving the INVITE message will be described with reference to the flowchart of FIG. This process is executed when an INVITE message is received via the network interface 22. First, it is determined whether the ID specifying the transceiver 4 is included in the TO header of the received INVITE message (S10). If an ID is included in the TO header (YES in S10), the wireless device number table 203 is searched for an INVITE message that directly designates the transceiver 4 (S11). If this ID is registered in the wireless device number table 203 (YES in S12), the corresponding wireless device number is read from the wireless device number table (S13), and this wireless device number is transferred to the repeater 3 for handling. The transceiver 4 is instructed to make an individual call (S14). Thereafter, the SIP procedure is advanced so that a call session is established between the transceiver 4 and the communication partner device. If the ID included in the TO header is not registered in the wireless device number table 203 (NO in S12), BUSY is returned to the counterpart device (S15), and the process is terminated.

  On the other hand, if the received INVITE message does not include an ID for designating the transceiver 4 (NO in S10), a signal (second dial instruction tone) for instructing the second dial to the counterpart device is returned (S20). ), Prompting the second dial, that is, input of ID. In response to this, when an ID is transmitted from the counterpart device (YES in S21), the wireless device number table 203 is searched with this ID (S25). If this ID is registered in the wireless device number table 203 (YES in S26), the corresponding wireless device number is read from the wireless device number table (S27), and this wireless device number is transferred to the repeater 3 for handling. The transceiver 4 is instructed to make an individual call (S28). Thereafter, the SIP procedure is advanced so that a call session is established between the transceiver 4 and the communication partner device. If the sent ID is not registered in the wireless device number table 203 (NO in S26), BUSY is returned to the counterpart device (S29), and the process is terminated.

  Note that if a certain time elapses without receiving an ID in S21 and a time-out occurs (YES in S22), BUSY is returned (S29), and the process ends.

  As described above, when the ID specifying the transceiver 4 is included in the TO header of the INVITE message, an individual call is made to the transceiver 4 specified by the ID without requesting the second dial from the counterpart device. If the TO header of the INVITE message does not contain an ID, a request for second dialing is made to the counterpart device, and the user of the counterpart device is prompted to input / transmit the ID again. It is possible to make a call from the transceiver 4 with a simple procedure and to make a call with a high degree of freedom that anyone can connect from a desktop telephone.

  The ID and the wireless device number correspond to the wireless device designation information of the present invention.

  In this embodiment, the telephone number table is used to convert the ID into the telephone number. However, if the ID and the telephone number are made the same character string (numerical value), the transceiver 4 can be directly connected with the ID without conversion. It becomes possible to call.

  In this embodiment, the telephone number table for converting the ID included in the TO header into the telephone number and the telephone number table for converting the ID sent by the second dial into the telephone number are shared. You may have it as a separate table.

1 Network 2 Relay Device 3 Repeater 4 Transceiver 6 IP Telephone 7 VoIP Gateway 8 Telephone

Claims (1)

A radio interface to which a relay radio that communicates with a plurality of terminal radios is connected;
A network that is connected to a network that is a data communication network and receives a communication request and radio designation information that designates one of the terminal radios in the form of an INVITE message of the SIP protocol from another device connected to the network Interface,
A control unit connected to the radio interface and the network interface;
With
The controller is
A table associating the radio designation information with a call code transmitted by the relay radio together with a voice signal;
When the INVITE message is received from the other device, the wireless device designation information included in the INVITE message is read, and the corresponding call code is read by searching the table with the read wireless device designation information. A relay device that transmits the read call code to the relay radio via the radio interface and instructs the relay radio to transmit a voice signal including the call code .

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